thumb|A stovetop pressure cooker A pressure cooker is a sealed vessel used for cooking food with the use of high pressure steam and water or a water-based liquid, in a process called pressure cooking
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba175b71301e5b04335b5770b11089a2efbdf97548b240fa32fa8ee5d0c47b5. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f3c6fb5-79f3-4e18-9a4b-9a07b83ff01d.json and https://artists.proofprofile.net/proofs/artist/6f3c6fb5-79f3-4e18-9a4b-9a07b83ff01d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).